oxlint.base.ts

import {join} from 'node:path';
import type {OxlintConfig} from 'oxlint';

// `import.meta.dirname`, not a file: URL's `.pathname`: a pathname is a URL path,
// so on Windows it is '/C:/…' and oxlint cannot load a plugin from it — which
// aborts the whole lint run rather than degrading. Taking the directory directly
// means no URL is constructed, so there is nothing to convert and nothing to get
// wrong.
const zeroPlugin = join(
  import.meta.dirname,
  'tools/oxlint-plugin-zero/index.js',
);

/**
 * Shared oxlint configuration for all packages in the monorepo.
 * This is a plain data module (not an oxlint config file) so it can be
 * imported by both root configs without triggering nested-config validation.
 */
export const baseConfig = {
  plugins: ['eslint', 'typescript', 'unicorn', 'jest'],
  jsPlugins: ['@e18e/eslint-plugin', zeroPlugin],
  ignorePatterns: [
    'node_modules',
    'dist',
    'coverage',
    'out',
    'tool',
    'bin',
    '*_generated.ts',
    'src/*/generated/',
    'perf/index.js',
    'um.js',
    'prod/sst/sst-env.d.ts',
    '**/um.js',
    '**/__snapshots__/**',
    // Expo app, deliberately not a workspace member: its tsconfig extends
    // expo/tsconfig.base from its own node_modules, which type-aware linting
    // cannot resolve from the repo root.
    'packages/replicache-perf/rn',
    'packages/zql-benchmarks/rn',
  ],
  rules: {
    // Disable unsafe optional chaining - many legitimate patterns in codebase
    'no-unsafe-optional-chaining': 'off',

    'no-console': 'error',
    'curly': ['error', 'multi-line'],
    'eqeqeq': 'error',
    'arrow-body-style': 'error',

    // Handle unused variables consistently with ESLint config
    'no-unused-vars': [
      'error',
      {
        argsIgnorePattern: '^_',
        varsIgnorePattern: '^_',
        caughtErrorsIgnorePattern: '^_',
      },
    ],

    // TypeScript-specific rules
    'typescript/no-explicit-any': 'error',
    'typescript/no-floating-promises': 'error',
    'typescript/no-non-null-assertion': 'warn',
    'typescript/consistent-type-imports': 'error',
    'typescript/no-unused-vars': [
      'error',
      {
        argsIgnorePattern: '^_',
        varsIgnorePattern: '^_',
        caughtErrorsIgnorePattern: '^_',
      },
    ],

    // Require await in async functions
    'require-await': 'error',

    // Vitest rules uses "jest" plugin
    'jest/no-focused-tests': 'error',
    'jest/no-standalone-expect': 'off',

    // Private class members (with inline disables for false positives)
    'no-unused-private-class-members': 'error',

    // Import restrictions - preserve the exact patterns from @rocicorp/eslint-config
    'no-restricted-imports': [
      'error',
      {
        patterns: [
          {
            group: [
              'datadog/*',
              'otel/*',
              'replicache/*',
              'replicache-perf/*',
              'shared/*',
              'zero/*',
              'zero-cache/*',
              'zero-client/*',
              'zero-protocol/*',
              'zero-react/*',
              'zero-react-native/*',
              'zero-schema/*',
              'zero-solid/*',
              'zero-vue/*',
              'zql/*',
              'zqlite/*',
              'zqlite-zql-test/*',
            ],
            message: 'Use relative imports instead',
          },
          {
            group: ['**/mod.ts'],
            message:
              "Don't import from barrel files. Import from the specific module instead.",
          },
          {
            group: ['**/*.test.ts', '**/*.test.tsx'],
            message: 'Do not import from test files.',
          },
          {
            group: ['sinon'],
            message: 'Use vi instead of sinon',
          },
        ],
        paths: [
          {name: 'datadog', message: 'Use relative imports instead'},
          {name: 'otel', message: 'Use relative imports instead'},
          {name: 'replicache', message: 'Use relative imports instead'},
          {
            name: 'replicache-perf',
            message: 'Use relative imports instead',
          },
          {name: 'shared', message: 'Use relative imports instead'},
          {name: 'zero', message: 'Use relative imports instead'},
          {name: 'zero-cache', message: 'Use relative imports instead'},
          {name: 'zero-client', message: 'Use relative imports instead'},
          {name: 'zero-protocol', message: 'Use relative imports instead'},
          {name: 'zero-react', message: 'Use relative imports instead'},
          {
            name: 'zero-react-native',
            message: 'Use relative imports instead',
          },
          {name: 'zero-schema', message: 'Use relative imports instead'},
          {name: 'zero-solid', message: 'Use relative imports instead'},
          {name: 'zero-vue', message: 'Use relative imports instead'},
          {name: 'zql', message: 'Use relative imports instead'},
          {name: 'zqlite', message: 'Use relative imports instead'},
          {name: 'zqlite-zql-test', message: 'Use relative imports instead'},
        ],
      },
    ],

    // Additional beneficial rules
    'unicorn/prefer-set-size': 'error',
    'unicorn/prefer-string-starts-ends-with': 'error',
    'unicorn/prefer-array-find': 'error',
    'unicorn/prefer-array-flat-map': 'error',
    'unicorn/prefer-set-has': 'error',

    // e18e modernization rules
    'e18e/prefer-array-at': 'error',
    'e18e/prefer-array-fill': 'error',
    'e18e/prefer-includes': 'error',
    'e18e/prefer-array-to-reversed': 'error',
    'e18e/prefer-array-to-sorted': 'error',
    'e18e/prefer-array-to-spliced': 'error',
    'e18e/prefer-nullish-coalescing': 'error',
    'e18e/prefer-object-has-own': 'error',
    'e18e/prefer-spread-syntax': 'error',
    'e18e/prefer-url-canparse': 'error',

    // e18e module replacement rules
    'e18e/ban-dependencies': 'error',

    // e18e performance improvement rules
    'e18e/prefer-array-from-map': 'error',
    'e18e/prefer-timer-args': 'error',
    'e18e/prefer-date-now': 'error',
    'e18e/prefer-regex-test': 'error',
    'e18e/prefer-array-some': 'error',
    'e18e/prefer-static-regex': 'error',

    'zero/no-select-star': [
      'error',
      {
        include: ['packages/zero-cache/src/'],
      },
    ],
  },
  overrides: [
    {
      files: ['**/*.test.*', '**/*.config.ts'],
      rules: {
        'e18e/prefer-static-regex': 'off',
      },
    },
  ],
} satisfies OxlintConfig;